cross_site_request_manager.h

// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.// Use of this source code is governed by a BSD-style license that can be// found in the LICENSE file.#ifndef CHROME_BROWSER_CROSS_SITE_REQUEST_MANAGER_H__#define CHROME_BROWSER_CROSS_SITE_REQUEST_MANAGER_H__#include <set>#include <utility>#include "base/basictypes.h"#include "base/lock.h"#include "base/singleton.h"// CrossSiteRequestManager is used to handle bookkeeping for cross-site// requests and responses between the UI and IO threads. Such requests involve// a transition from one RenderViewHost to another within TabContents, and// involve coordination with ResourceDispatcherHost.//// CrossSiteRequestManager is a singleton that may be used on any thread.//class CrossSiteRequestManager {
public:
// Returns whether the RenderViewHost specified by the given IDs currently// has a pending cross-site request. If so, we will have to delay the// response until the previous RenderViewHost runs its onunload handler.// Called by ResourceDispatcherHost on the IO thread.bool HasPendingCrossSiteRequest(int renderer_id, int render_view_id);
// Sets whether the RenderViewHost specified by the given IDs currently has a// pending cross-site request. Called by RenderViewHost on the UI thread.void SetHasPendingCrossSiteRequest(int renderer_id,
int render_view_id,
bool has_pending);
private:
friendstruct DefaultSingletonTraits<CrossSiteRequestManager>;
typedef std::set<std::pair<int, int> > RenderViewSet;
// Obtain an instance of CrossSiteRequestManager via// Singleton<CrossSiteRequestManager>().
CrossSiteRequestManager() {}
// You must acquire this lock before reading or writing any members of this// class. You must not block while holding this lock.
Lock lock_;
// Set of (render_process_host_id, render_view_id) pairs of all// RenderViewHosts that have pending cross-site requests. Used to pass// information about the RenderViewHosts between the UI and IO threads.
RenderViewSet pending_cross_site_views_;
DISALLOW_EVIL_CONSTRUCTORS(CrossSiteRequestManager);
};
#endif // CHROME_BROWSER_CROSS_SITE_REQUEST_MANAGER_H__